Aging refuse landfill leachate pretreatment oxidation device

Abstract

The utility model discloses an aging refuse landfill leachate pretreatment oxidation device, which belongs to the technical field of landfill leachate treatment equipment, and comprises an equipment shell, the equipment shell is fixedly connected with a support plate through a denitrification section, a denitrification component is attached to the top of the support plate, and the denitrification section is fixedly connected with the equipment shell. The outer side wall of the equipment shell is fixedly connected with an oxidation assembly, and the equipment shell is fixedly connected with a filtering assembly through a filtering section. According to the aging refuse landfill leachate pretreatment oxidation device, a denitrification zone, an oxidation zone and a filtering zone are longitudinally distributed in an equipment shell, and a denitrification assembly, an oxidation assembly and a filtering assembly are arranged in the denitrification zone, the oxidation zone and the filtering zone which are distributed in the equipment shell correspondingly; and impurities such as ammonia nitrogen, refractory organics, macromolecular organics, colloids and bacteria in the leachate are removed, so that the aged refuse landfill leachate is effectively treated, and environmental pollution is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of landfill leachate treatment equipment, and specifically relates to a pretreatment oxidation device for landfill leachate in aging landfills. Background Technique

[0002] Landfill leachate mainly comes from precipitation infiltration, groundwater intrusion, and the moisture contained in the garbage itself. It has high pollutant concentration, complex pollution components, and is difficult to treat. As the landfill age increases, the organic matter content in the leachate decreases year by year, and the ammonia nitrogen concentration increases year by year. Leachate with a landfill age of less than 5 years belongs to early leachate, which contains more easily biodegradable organic matter, and the B / C ratio is about 0.4 - 0.8, with good biodegradability. The leachate with a landfill age of 5 - 10 years is medium-term leachate, and its B / C ratio is about 0.2 - 0.4. At this time, the organic matter begins to decrease, the ammonia nitrogen increases, and the biodegradability begins to deteriorate. The leachate from landfills with a landfill age of more than 10 years belongs to aging landfill leachate. At this time, the organic matter in the leachate is mostly macromolecular and difficult-to-degrade humic acid and fulvic acid, etc., and the B / C ratio even drops below 0.1, making it difficult to treat.

[0003] The water quality of aging landfills mostly shows the characteristics of high salinity, high ammonia nitrogen concentration, and carbon-nitrogen ratio imbalance; the leachate has high salinity, low carbon-nitrogen ratio, and poor biodegradability. The membrane separation method has a low recovery rate and high energy consumption, and both the technical feasibility and economy are relatively poor. The biological method also faces the inhibition and toxicity of high salinity to microorganisms; the existing leachate treatment process cannot completely solve the pollutant problem of landfill leachate membrane concentrate, which is likely to damage the environment and thus does not meet the requirements of sustainable development.

[0004] To solve the above problems, a pretreatment oxidation device for landfill leachate in aging landfills is proposed in this application. Content of the Utility Model

[0005] In view of the problems in the related art, the utility model proposes a pretreatment oxidation device for landfill leachate in aging landfills to overcome the above technical problems existing in the existing related art.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pretreatment oxidation device for landfill leachate in aging landfills includes an equipment housing. The inner side wall of the equipment housing is provided with a denitrification zone, an oxidation zone, and a filtration zone. The denitrification zone, oxidation zone, and filtration zone are arranged longitudinally. The equipment housing is fixedly connected to a support plate through the denitrification zone. The top of the support plate is attached to a denitrification removal component. The outer side wall of the equipment housing is fixedly connected to an oxidation component. The equipment housing is fixedly connected to a filtration component through the filtration zone.

[0008] Preferably, the nitrogen removal component includes a mounting frame, the inner side wall of the mounting frame is fixedly connected with a carbon fiber board, filter holes are formed in the outer side wall of the carbon fiber board, and a bacterial layer is attached to the outer side wall of the carbon fiber board.

[0009] By providing the mounting frame, carbon fiber board, filter holes and bacterial layer, a plurality of carbon fiber boards are linearly arrayed inside the mounting frame, and a bacterial layer is planted on the outer side wall of the carbon fiber board. The bacterial layer is a nitrifying bacteria agent.

[0010] Preferably, the oxidation component includes an ozone generator fixed on the outer side wall of the equipment housing. A first delivery pipe is fixedly connected to the top of the ozone generator. One end of the first delivery pipe away from the ozone generator is fixedly connected to a shunt pipe, and a discharge pipe is fixedly connected to the bottom of the shunt pipe.

[0011] By providing the ozone generator, first delivery pipe, shunt pipe and discharge pipe, ozone is produced by the ozone generator and transported to the bottom of the oxidation zone through the first delivery pipe, shunt pipe and discharge pipe, thereby decomposing the refractory organic matter in the leachate inside the oxidation zone and improving the biodegradability of the sewage.

[0012] Preferably, the filtration component includes a liquid inlet pipe. One end of the liquid inlet pipe away from the equipment housing is fixedly connected to an ultrafiltration main body. A second delivery pipe is fixedly connected to the bottom of the ultrafiltration main body. One end of the second delivery pipe away from the ultrafiltration main body is fixedly connected to a heating frame.

[0013] By providing the liquid inlet pipe, ultrafiltration main body, second delivery pipe and heating frame, impurities such as macromolecular organic matter, colloid, bacteria, etc. contained in the decomposed leachate are removed by the ultrafiltration main body.

[0014] Preferably, a cover plate is hinged to the top of the heating frame. An exhaust pipe is arranged on the top of the heating frame, and an evaporator is attached to the inner side wall of the heating frame.

[0015] By providing the evaporator, the filtered leachate is evaporated by installing the evaporator inside the heating frame, separating the salt and water in the leachate, and achieving zero discharge.

[0016] Preferably, a sealing cover is attached to the top of the equipment housing. A water pump is fixedly connected to the outer side wall of the equipment housing. Both ends of the water pump are communicated with the denitrification zone and the oxidation zone respectively.

[0017] By providing the sealing cover and the water pump, the liquid inlet opened on the top of the equipment housing is sealed by the sealing cover to prevent the leachate from splashing. The two ends of the water pump are connected to the denitrification zone and the oxidation zone, so that the water pump can transport the leachate inside the denitrification zone to the inside of the oxidation zone.

[0018] In summary, the technical effects and advantages of the present utility model are as follows: In the leachate pretreatment oxidation device for aging landfill, a denitrification zone, an oxidation zone, and a filtration zone are longitudinally distributed inside the equipment housing. And a denitrification component, an oxidation component, and a filtration component are respectively arranged inside the denitrification zone, oxidation zone, and filtration zone distributed inside the equipment housing to remove impurities such as ammonia nitrogen, refractory organic matter, macromolecular organic matter, colloid, and bacteria in the leachate, thereby effectively treating the leachate of the aging landfill and avoiding environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is a schematic diagram of the support plate and its related structure of the present utility model;

[0021] Figure 3 is a schematic diagram of the denitrification component and its related structure of the present utility model;

[0022] Figure 4 is a schematic diagram of the oxidation component and its related structure of the present utility model;

[0023] Figure 5 is a schematic diagram of the filtration component and its related structure of the present utility model.

[0024] In the figure: 1, equipment housing; 2, denitrification zone; 3, support plate; 4, denitrification component; 401, installation frame; 402, carbon fiber board; 403, filter holes; 404, bacterial layer; 5, oxidation zone; 6, oxidation component; 601, ozone generator; 602, first delivery pipe; 603, shunt pipe; 604, discharge pipe; 7, filtration zone; 8, filtration component; 801, liquid inlet pipe; 802, ultrafiltration main body; 803, second delivery pipe; 804, heating frame; 805, evaporator; 9, sealing cover; 10, water pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0026] Refer to Figure 1-2, An oxidation device for pretreatment of leachate from an aging landfill, comprising an equipment housing 1. The inner side wall of the equipment housing 1 is provided with a denitrification section 2, an oxidation section 5 and a filtration section 7. The denitrification section 2, the oxidation section 5 and the filtration section 7 are arranged longitudinally. The equipment housing 1 is fixedly connected with a support plate 3 through the denitrification section 2. The top of the support plate 3 is attached with a denitrification removal component 4. The outer side wall of the equipment housing 1 is fixedly connected with an oxidation component 6. The equipment housing 1 is fixedly connected with a filtration component 8 through the filtration section 7. By longitudinally arranging the denitrification section 2, the oxidation section 5 and the filtration section 7 inside the equipment housing 1, and supporting the denitrification removal component 4 through the support plate 3, the denitrification removal component 4 is installed inside the denitrification section 2. By installing the oxidation component 6 at the inner bottom of the oxidation section 5, ozone can effectively enter the inside of the oxidation section 5. By installing the filtration component 8 inside the filtration section 7, the leachate from the aging landfill flows from top to bottom, and the leachate is decomposed and filtered when passing through the denitrification removal component 4, the oxidation component 6 and the filtration component 8, so as to reach the discharge standard and avoid affecting and damaging the environment.

[0027] Refer to Figure 2-3 , The denitrification removal component 4 includes an installation frame 401. The inner side wall of the installation frame 401 is fixedly connected with a carbon fiber board 402. The outer side wall of the carbon fiber board 402 is provided with filter holes 403. The outer side wall of the carbon fiber board 402 is attached with a bacterial layer 404. By installing the arranged multi-layer carbon fiber boards 402 inside the installation frame 401, and filter holes 403 are provided on the outer side walls of the carbon fiber boards 402, and a bacterial layer 404 is inoculated on the outer surface of the carbon fiber board 402. The bacterial layer 404 is a high-efficiency nitrifying bacteria agent, so as to effectively remove ammonia nitrogen in the leachate. Since the denitrification removal component 4 is installed in the middle of the denitrification section 2, the leachate needs to pass through the denitrification removal component 4 to carry out the next operation, so as to effectively remove ammonia nitrogen in the leachate more thoroughly and avoid leakage.

[0028] Refer to Figure 4 , The oxidation component 6 includes an ozone generator 601 fixed on the outer side wall of the equipment housing 1. The top of the ozone generator 601 is fixedly connected with a first delivery pipe 602. One end of the first delivery pipe 602 away from the ozone generator 601 is fixedly connected with a shunt pipe 603. The bottom of the shunt pipe 603 is fixedly connected with a discharge pipe 604. Ozone is generated by the ozone generator 601 installed on the outer side wall of the equipment housing 1 and is delivered to the inside of the shunt pipe 603 through the first delivery pipe 602. The shunt pipe 603 is located at the inner bottom of the oxidation section 5. The ozone is delivered into the inner bottom of the oxidation section 5 through the discharge pipe 604, so as to effectively decompose the refractory organic matter in the leachate by ozone and improve the biodegradability of the sewage.

[0029] Refer to Figure 5, the filtration component 8 includes a liquid inlet pipe 801. One end of the liquid inlet pipe 801 away from the equipment housing 1 is fixedly connected to an ultrafiltration main body 802. The bottom of the ultrafiltration main body 802 is fixedly connected to a second delivery pipe 803. One end of the second delivery pipe 803 away from the ultrafiltration main body 802 is fixedly connected to a heating frame 804. The bottom of the oxidation zone 5 is communicated through the liquid inlet pipe 801, so that the liquid inlet pipe 801 can transport the leachate inside the oxidation zone 5 into the ultrafiltration main body 802. The ultrafiltration main body 802 filters the leachate, filtering impurities such as macromolecular organic matter, colloid, and bacteria contained in the leachate. After filtration, it is transported into the heating frame 804 through the second delivery pipe 803.

[0030] Refer to Figure 5 , a cover plate is hinged to the top of the heating frame 804. An exhaust pipe is provided at the top of the heating frame 804. An evaporator 805 is attached to the inner side wall of the heating frame 804. By installing the evaporator 805 inside the heating frame 804, when the filtered leachate is transported into the evaporator 805, the heating frame 804 heats the evaporator 805. Since the exhaust pipe installed at the top of the heating frame 804 discharges water vapor, the crystallization is removed through the hinged cover plate, thereby separating the salt and water in the membrane leachate and achieving zero discharge.

[0031] Refer to Figure 1-2 , a sealing cover 9 is attached to the top of the equipment housing 1. A water pump 10 is fixedly connected to the outer side wall of the equipment housing 1. Both ends of the water pump 10 are communicated with the denitrification zone 2 and the oxidation zone 5 respectively. The liquid inlet at the top of the equipment housing 1 is blocked by the sealing cover 9 installed at the top of the equipment housing 1 to avoid leakage. Since both ends of the water pump 10 are communicated with the denitrification zone 2 and the oxidation zone 5, the water pump 10 transports the leachate after ammonia nitrogen removal inside the denitrification zone 2, so that the leachate enters the oxidation zone 5.

[0032] Working principle: The leachate from the aging landfill is transported into the interior of the denitrification section 2 through the top of the equipment housing 1, so that the leachate flows through the denitrification component 4, enters the bottom of the denitrification section 2 through the denitrification component 4, and the ammonia nitrogen contained in the leachate is removed by the carbon fiber plate 402 and the bacterial layer 404. The denitrified leachate is transported into the interior of the oxidation section 5 through the water pump 10. The ozone generated by the ozone generator 601 is transported into the interior of the shunt pipe 603 through the first delivery pipe 602, and the ozone is discharged into the bottom of the leachate inside the oxidation section 5 through the discharge pipe 604 at the top of the shunt pipe 603, thereby effectively decomposing the refractory organic matter inside the leachate and improving the biodegradability of the sewage. The decomposed leachate in the oxidation section 5 is transported into the interior of the ultrafiltration main body 802 through the inlet pipe 801. The ultrafiltration main body 802 filters out impurities such as macromolecular organic matter, colloid, and bacteria contained in the leachate. The filtered leachate is transported to the interior of the evaporator 805 through the second delivery pipe 803. The evaporator 805 is heated by the heating frame 804, thereby evaporating and crystallizing the leachate, separating the salts and water in the leachate, and achieving zero discharge.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oxidation device for pretreatment of leachate from an aging landfill, comprising an equipment housing (1), characterized in that, On the inner sidewall of the device housing (1), a denitrification section (2), an oxidation section (5), and a filtration section (7) are provided. The denitrification section (2), the oxidation section (5), and the filtration section (7) are arranged longitudinally. The device housing (1) is fixedly connected to a support plate (3) through the denitrification section (2). A denitrification removal component (4) is attached to the top of the support plate (3). An oxidation component (6) is fixedly connected to the outer sidewall of the device housing (1). The device housing (1) is fixedly connected to a filtration component (8) through the filtration section (7).

2. The pretreatment oxidation device for landfill leachate in an aging landfill according to claim 1, characterized in that, The denitrification removal component (4) includes a mounting frame (401). On the inner sidewall of the mounting frame (401), a carbon fiber plate (402) is fixedly connected. Filter holes (403) are provided on the outer sidewall of the carbon fiber plate (402). A bacterial layer (404) is attached to the outer sidewall of the carbon fiber plate (402).

3. An oxidation device for pre-treating leachate of an aging landfill according to claim 1, characterized in that, The oxidation component (6) includes an ozone generator (601) fixed to the outer sidewall of the device housing (1). A first delivery pipe (602) is fixedly connected to the top of the ozone generator (601). One end of the first delivery pipe (602) away from the ozone generator (601) is fixedly connected to a manifold pipe (603). A discharge pipe (604) is fixedly connected to the bottom of the manifold pipe (603).

4. An oxidation device for pretreatment of leachate from an aging landfill according to claim 1, characterized in that, The filtration component (8) includes a liquid inlet pipe (801). One end of the liquid inlet pipe (801) away from the device housing (1) is fixedly connected to an ultrafiltration main body (802). A second delivery pipe (803) is fixedly connected to the bottom of the ultrafiltration main body (802). One end of the second delivery pipe (803) away from the ultrafiltration main body (802) is fixedly connected to a heating frame (804).

5. An oxidation device for pretreatment of leachate from an aging landfill according to claim 4, characterized in that, A cover plate is hinged to the top of the heating frame (804). An exhaust pipe is provided on the top of the heating frame (804). An evaporator (805) is attached to the inner sidewall of the heating frame (804).

6. An oxidation device for pretreatment of leachate from an aging landfill according to claim 1, characterized in that, A sealing cover (9) is attached to the top of the device housing (1). A water pump (10) is fixedly connected to the outer sidewall of the device housing (1). The two ends of the water pump (10) are respectively communicated with the denitrification section (2) and the oxidation section (5).

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